TFT LCD库Arduino版ESP8266\32\STM32通用

 库下载地址：

https://github.com/Bodmer/TFT_eSPI

NodeMCU ESP8266-12 针脚连接方式：

// Display SDO/MISO  to NodeMCU pin D6 (or leave disconnected if not reading TFT)

// Display LED       to NodeMCU pin VIN (or 5V, see below)

// Display SCK       to NodeMCU pin D5

// Display SDI/MOSI  to NodeMCU pin D7

// Display DC (RS/AO)to NodeMCU pin D3

// Display RESET     to NodeMCU pin D4 (or RST, see below)

// Display CS        to NodeMCU pin D8 (只有一个屏幕也可以接GND节省一个脚)

// Display GND       to NodeMCU pin GND (0V)

// Display VCC       to NodeMCU 5V or 3.3V

其他板子在User_Setup.h修改即可：

//对于NodeMCU-使用pin_Dx形式的管脚号，其中Dx是NodeMCU管脚名称

//#define TFT_CS   PIN_D8  // 芯片选择控制引脚D8

#define TFT_DC   PIN_D3  // Data Command control pin

//#define TFT_RST  PIN_D4  // 复位引脚（可以连接到NodeMCU RST，见下一行）

#define TFT_RST  -1    // 如果显示器复位连接到NodeMCU RST或3.3V，则将TFT-RST设置为-1

下面是一个仿真时钟例程：

#include <SPI.h>

#include <TFT_eSPI.h> // Hardware-specific library

#define TFT_GREY 0x5AEB

TFT_eSPI tft = TFT_eSPI();       // Invoke custom library

float sx = 0, sy = 1, mx = 1, my = 0, hx = -1, hy = 0;    // Saved H, M, S x & y multipliers

float sdeg=0, mdeg=0, hdeg=0;

uint16_t osx=120, osy=120, omx=120, omy=120, ohx=120, ohy=120;  // Saved H, M, S x & y coords

uint16_t x0=0, x1=0, yy0=0, yy1=0;

uint32_t targetTime = 0;                    // for next 1 second timeout

static uint8_t conv2d(const char* p); // Forward declaration needed for IDE 1.6.x

uint8_t hh=conv2d(__TIME__), mm=conv2d(__TIME__+3), ss=conv2d(__TIME__+6);  // Get H, M, S from compile time

boolean initial = 1;

void setup(void) {

  tft.init();

  tft.setRotation(0);

  tft.fillScreen(TFT_GREY);

  tft.setTextColor(TFT_WHITE, TFT_GREY);  // Adding a background colour erases previous text automatically

  // Draw clock face

  tft.fillCircle(120, 120, 118, TFT_GREEN);

  tft.fillCircle(120, 120, 110, TFT_BLACK);

  // Draw 12 lines

  for(int i = 0; i<360; i+= 30) {

    sx = cos((i-90)*0.0174532925);

    sy = sin((i-90)*0.0174532925);

    x0 = sx*114+120;

    yy0 = sy*114+120;

    x1 = sx*100+120;

    yy1 = sy*100+120;

    tft.drawLine(x0, yy0, x1, yy1, TFT_GREEN);

  }

  // Draw 60 dots

  for(int i = 0; i<360; i+= 6) {

    sx = cos((i-90)*0.0174532925);

    sy = sin((i-90)*0.0174532925);

    x0 = sx*102+120;

    yy0 = sy*102+120;

    // Draw minute markers

    tft.drawPixel(x0, yy0, TFT_WHITE);

    // Draw main quadrant dots

    if(i==0 || i==180) tft.fillCircle(x0, yy0, 2, TFT_WHITE);

    if(i==90 || i==270) tft.fillCircle(x0, yy0, 2, TFT_WHITE);

  }

  tft.fillCircle(120, 121, 3, TFT_WHITE);

  // Draw text at position 120,260 using fonts 4

  // Only font numbers 2,4,6,7 are valid. Font 6 only contains characters [space] 0 1 2 3 4 5 6 7 8 9 : . - a p m

  // Font 7 is a 7 segment font and only contains characters [space] 0 1 2 3 4 5 6 7 8 9 : .

  tft.drawCentreString("Time flies",120,260,4);

  targetTime = millis() + 1000; 

}

void loop() {

  if (targetTime < millis()) {

    targetTime += 1000;

    ss++;              // Advance second

    if (ss==60) {

      ss=0;

      mm++;            // Advance minute

      if(mm>59) {

        mm=0;

        hh++;          // Advance hour

        if (hh>23) {

          hh=0;

        }

      }

    }

    // Pre-compute hand degrees, x & y coords for a fast screen update

    sdeg = ss*6;                  // 0-59 -> 0-354

    mdeg = mm*6+sdeg*0.01666667;  // 0-59 -> 0-360 - includes seconds

    hdeg = hh*30+mdeg*0.0833333;  // 0-11 -> 0-360 - includes minutes and seconds

    hx = cos((hdeg-90)*0.0174532925);    

    hy = sin((hdeg-90)*0.0174532925);

    mx = cos((mdeg-90)*0.0174532925);    

    my = sin((mdeg-90)*0.0174532925);

    sx = cos((sdeg-90)*0.0174532925);    

    sy = sin((sdeg-90)*0.0174532925);

    if (ss==0 || initial) {

      initial = 0;

      // Erase hour and minute hand positions every minute

      tft.drawLine(ohx, ohy, 120, 121, TFT_BLACK);

      ohx = hx*62+121;    

      ohy = hy*62+121;

      tft.drawLine(omx, omy, 120, 121, TFT_BLACK);

      omx = mx*84+120;    

      omy = my*84+121;

    }

      // Redraw new hand positions, hour and minute hands not erased here to avoid flicker

      tft.drawLine(osx, osy, 120, 121, TFT_BLACK);

      osx = sx*90+121;    

      osy = sy*90+121;

      tft.drawLine(osx, osy, 120, 121, TFT_RED);

      tft.drawLine(ohx, ohy, 120, 121, TFT_WHITE);

      tft.drawLine(omx, omy, 120, 121, TFT_WHITE);

      tft.drawLine(osx, osy, 120, 121, TFT_RED);

    tft.fillCircle(120, 121, 3, TFT_RED);

  }

}

static uint8_t conv2d(const char* p) {

  uint8_t v = 0;

  if ('0' <= *p && *p <= '9')

    v = *p - '0';

  return 10 * v + *++p - '0';

}